Clamp



H. V. HOLMAN.

CLAMP.

APPLICATION man MAY 9, 1921 1,403,958, I Patented Jan. 17, 1922.

HARRY V. HOLD/IAN, OF CHICAGO, ILLINOIS.

CLAMP.

Application filed May 9, 1921.

To all whom it may concern Be it known that I, HARRY V. l-IoLMAN. acitizen of the United States of America, and resident of Chicago, CookCounty Illinois have invented a certain new and useful Improvement inClamps, of which the following is a specification.

My invention relates to an improvement in clamps particularly of thetypeemployed by cabinet makers, and is in the nature of an improvementon the type of clamp shown in the patent to Jorgensen, Number 687,836issued December 3 1901.

The object of my invention is to provide a clamp of increased strengthand durability and also to improve the out-ward appearance of saidclamp.

These and other features and objects of my invention will be morereadily understood by having reterence to the accompanying drawings. inwhich Figure 1 is a side elevation of proved clamp.

Fig. 2 a transverse sectional view.

Fig. is a plan view ot one of the jaws showing a slightly modifiedconstruction.

As illustrated, theeclamp consists ot a pair of jaws Each of these jawsis bored latmy im a. orally at corresponding points to receive twocylindrical nuts 6, 6. Each oi these nuts is bored and tappedtransversely at their middle portion to receive the right and leftthreaded rods 8 which pass through transverse opcnings 9 in the jaws,these openings being of flaring shape to permit pivotal movement of saidrods. The transverse openings in which the bearing nuts 6 are journaleddo not extend entirely through the jaw as in the prior Jorgensen patent,but merely extend from one side of the jaw to a point sufficientlybeyond the transverse opening 9 in the jaw to provide sufficient bearingarea for the nuts. The nuts likewise after being inserted in the jaw donot extend to the surface of the same, and the space over the outer endof the nuts is closed by a wooden plug 10 which is glued into theopening, the outer surface of this plug being flush with the surface ofthe jaw thus presenting a neat appearing clamp. This constructiongreatly increases the strength of the jaw as itis found Where thetransverse Specification of Letters Patent.

Patented Jan. 17, 1922. Serial No. 168,091.

bore for the nut extends entirely through the jaw that the jaw isweakened at this point. By merely having the bore extend. partly throughthe jaw, the strength of the same is not weakened to such an extent andthe wooden plug. which is glued into the jaw,

becomes in effect an integral part of the jaw.

In Fig. 3, I have shown a slightly modified form of my construction inwhich the jaws are formed of two parts 11 and 12 which are provided withsuitable recesses 13 for receiving the nuts 6. The nuts can first beinserted in place in these recesses, and then the two parts of the jawglued together. With this construction I avoid the necessity of usingthe wooden plugs 10 as the transverse openings do not extend to eitherof the outside surfaces of the jaw.

It will thus be seen that I have devised a clamp of the type describedof increased strength, and while I have illustrated and describedcertain specific embodiments of my invention. it will be understood thatI do not wish to be limited to the exact construction shown anddescribed. but that various changes and modifications may be madewithout departing from the spirit and intent of my invention.

hat I claim as my invention is:

1. In a clamp, the combination of two relatively movable jaws, a pair ofcylindrical nuts journaled within each of said jaws and terminating asubstantial distance from either of the surfaces of said jaws, thematerial of said jaw extending over and covering both ends of saidbearing nuts, lateral screw-threaded openings in said nuts, lateralflaring openings in said jaws registering with said openings in saidnuts, and screw-threaded rods passing through said openings in said jawsand said nuts and engaging the latter to operate said jaws.

2. In a clamp, the combination of two relatively movable jaws, a pair oftransverse cylindrical openings in each of said jaws, each of saidopenings extending from one surface of said jaws and terminating asubstantial distance from the opposite surface thereof. cylindrical nutsjournaled in said openings, the outer end of said nuts terminating asubstantial distance from the outer end of said transverse opening,wooden plugs inserted Within said openings over said lateral openings insaid jaws and said .the ends of said bearing nuts, lateral screwnuts andengaging the latter to operate said threaded openings in said nuts,lateral fiarjaws. 10 ing openings in said jaws at right angles Signed byme at Chicago, Illinois, this 3 to said first-mentioned transverseopenings day of May, 1921.

and registering with the openings in said nuts, and threaded rodspassing through HARRY V. HOLMAN.

